Constructional strip and method of making same



Patented Feb. 18, 1930 UNITED STATES ALBERT o. FISCHER, or CHICAGO,

PATENT OFFICE ILLINOIS, ASSIGNOR TO THE PHILIP CAREY MANU- FACTURING COMPANY, A CORPORATION OF OHIO No Drawing. Application filed December 12, 1925, Serial No. 75,150. Renewed July 1, 1927.

This invention relates to constructional stripsand the method of fabricating them from any suitable bituminous material by mixing said bituminous material with uncoagulated latex and mixing in the fibrous materlal to stiffen the mass. If a mass having a more flexible character'is desired'the fibrouslated latex and then adding the fibrous material, or by mixing the uncoagulated latex with the fibrous material and then adding the bituminousmaterial. 1

The invention is typified by an expansion joint strip formed from a mixture of the ingredients described.

A suitable formula for this mixture would be uncoagulated latex five (5) per cent, (consixty-five (65) per cent water, thirty-three (33) per cent rubber and two (2) per cent ammonia) bituminous material eighty (80) per cent and fibrous matter fifteen (15) per 'cent. Obviously, the uncoagulated latex may contain its ingredients in proportions other than specified herein without impairing its'effect for the intended purpose.

The best means of mixing these materials is to utilize high power mixers, which are known to the art, and after approximately thirty minutes of mixing the batch is pressed between rolls and formed into sheets, which are cut into strips suitable for use as premoulded expansionjoints. The latitude of operation is wide, by reason of the numerous grades and means of bituminous matter, all of which have an affinity for uncoagulated latex. Other suitable adulterants may be used, but the toughness and cohesion, as well as making thematerial immune to air, light and moisture, is brought about by the uncoagulated latex. It can readily'be understoodthat the moisture will evaporate when the mass is heated, thus incorporating the rubber in a small, divided state. I

Though I'have described with particularity of detail a certain specific embodiment of my inv ention, yet it is not to be understood therefrom that the invention is restricted to the particular embodiment disclosed. Various changes of detail may be made by those skilled in the art without departing from the invention.

I claim:

1'. An expansion joint comprising a felted, mat-like strip of fibrous material permeated with a Waterproof binder, said binder comprising a mixture of asphalt and'uncoagulated latex.

2. A preformed expansion joint comprising about eighty per cent bituminous material, about five per cent uncoagulated latex and about fifteen per cent fibrous material.

3. The method of making a preformed constructional strip which comprises mixing plastic bituminous material, uncoagulated latex and fibrous material into a homogeneous mass and thereafter shaping the mass to form. sisting preferably though not essentially of 4. The method of preparing preformed expansion strips which consists in mixing b1- tuminous material with uncoagulated latex and fibrous material, and thereafter pressing the mass between sheet forming rolls and finally cutting said sheets into expansion joint strips.

5. A preformed expansionjoint comprising a homogeneous mixture'of bituminous material, uncoagulated latex and fibrous material.

6. A preformed expansion joint comprising uncoagulated latex Within a body of bituminous material.

7. A preformed constructional material comprising a homogeneous mixture of bituminous material and uncoagulated latex.

8. A preformed expansion joint comprising a body of bituminous material, and rubber particles uniformly diffused therein.

9. A preformed expansion joint comprising a bituminous body, fibrous material in said body, and rubber particles uniformly distributed throughout said body in a finely divided state.

10. A method of forming composite expansion strips which consists in mixing an emulsified rubber solution with a waterproof material in its plastic state, and then Lubjecting the resulting mass to pressure to impart a predetermined density thereto.

11. A method of forming composite expansion strips which consists in mixing an emulsified rubber solution with a liquid bituminous material, reducing the resulting product to a'plastically solid state, and then imparting a predetermined shape thereto.

12. A method of forming an expansion joint composition which consists in mixing a latex solution with liquid bituminous material, incorporating a fibrous filler therein, and then reducing the resulting product to a solid of predetermined shape.

13. The method of making a preformed I constructional strip which comprises mixing plastic bituminous material, rubber particles, and fibrous material into a plastic mass, and thereafter shaping the mass to I form.

14. The method of making a preformed expansion joint strip which comprises mixing bituminous material and rubber particles into a plastic mass, and thereafter shaping the mass to form.

Signed at Chicago, Illinois, this 10 day of Dec. A. D. 1925.

ALBERT C. FISCHER 

